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authorKhalid Aziz <khalid.aziz@oracle.com>2015-05-27 18:00:46 +0200
committerDavid S. Miller <davem@davemloft.net>2015-06-01 07:15:01 +0200
commit494e5b6faeda1d1e830a13e10b3c7bc323f35d97 (patch)
tree612e28b6b6678d133d960b9241401aa0e8ddc98d /arch/sparc/kernel/entry.h
parentsparc64: pci slots information is not populated in sysfs (diff)
downloadlinux-494e5b6faeda1d1e830a13e10b3c7bc323f35d97.tar.xz
linux-494e5b6faeda1d1e830a13e10b3c7bc323f35d97.zip
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE Bit 9 of TTE is CV (Cacheable in V-cache) on sparc v9 processor while the same bit 9 is MCDE (Memory Corruption Detection Enable) on M7 processor. This creates a conflicting usage of the same bit. Kernel sets TTE.cv bit on all pages for sun4v architecture which works well for sparc v9 but enables memory corruption detection on M7 processor which is not the intent. This patch adds code to determine if kernel is running on M7 processor and takes steps to not enable memory corruption detection in TTE erroneously. Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/entry.h')
-rw-r--r--arch/sparc/kernel/entry.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/kernel/entry.h b/arch/sparc/kernel/entry.h
index 07cc49e541f4..0f679421b468 100644
--- a/arch/sparc/kernel/entry.h
+++ b/arch/sparc/kernel/entry.h
@@ -69,6 +69,8 @@ void sun4v_patch_1insn_range(struct sun4v_1insn_patch_entry *,
struct sun4v_1insn_patch_entry *);
void sun4v_patch_2insn_range(struct sun4v_2insn_patch_entry *,
struct sun4v_2insn_patch_entry *);
+void sun_m7_patch_2insn_range(struct sun4v_2insn_patch_entry *,
+ struct sun4v_2insn_patch_entry *);
extern unsigned int dcache_parity_tl1_occurred;
extern unsigned int icache_parity_tl1_occurred;